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authorDavid Ahern <dsahern@gmail.com>2017-07-05 14:41:46 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-07-21 07:44:55 +0200
commiteb7bef1db6f31cdba61a0d8794839fab57da5ed8 (patch)
tree299b009c0d76d330cb2eba3e7877adb006cc40cf /net/ipv6/ip6_fib.c
parent0c32b01ee49d4784ac85fb4a4ee903ac86e7d183 (diff)
net: ipv6: Compare lwstate in detecting duplicate nexthops
commit f06b7549b79e29a672336d4e134524373fb7a232 upstream. Lennert reported a failure to add different mpls encaps in a multipath route: $ ip -6 route add 1234::/16 \ nexthop encap mpls 10 via fe80::1 dev ens3 \ nexthop encap mpls 20 via fe80::1 dev ens3 RTNETLINK answers: File exists The problem is that the duplicate nexthop detection does not compare lwtunnel configuration. Add it. Fixes: 19e42e451506 ("ipv6: support for fib route lwtunnel encap attributes") Signed-off-by: David Ahern <dsahern@gmail.com> Reported-by: João Taveira Araújo <joao.taveira@gmail.com> Reported-by: Lennert Buytenhek <buytenh@wantstofly.org> Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com> Tested-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6/ip6_fib.c')
-rw-r--r--net/ipv6/ip6_fib.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 1ac06723f0d7..f60e8caea767 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -767,10 +767,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
goto next_iter;
}
- if (iter->dst.dev == rt->dst.dev &&
- iter->rt6i_idev == rt->rt6i_idev &&
- ipv6_addr_equal(&iter->rt6i_gateway,
- &rt->rt6i_gateway)) {
+ if (rt6_duplicate_nexthop(iter, rt)) {
if (rt->rt6i_nsiblings)
rt->rt6i_nsiblings = 0;
if (!(iter->rt6i_flags & RTF_EXPIRES))